| 释义 |
hewettite Min.|ˈhjuːɪtaɪt|
[f. the name of Donnel Foster Hewett (1881–1971), American geologist: see -ite1.]
A deep red hydrated calcium vanadate, CaV6O16·9H2O, occuring in nodules and as the coating of fibres or needles (see also quot. 1955).
1914W. F. Hillebrand et al. in Proc. Amer. Philos. Soc. LIII. 31 The Peruvian mineral..we are pleased to name hewettite, after Mr. D. Foster Hewett, now of the U.S. Geological Survey, who has done so much to make the Minasragra occurrence known. 1955Amer. Mineralogist XL. 691 There appear to be three types of material variously labelled ‘hewettite’ or ‘metahewettite’, namely, (I) hewettite, CaO·3V2O5·nH2O.., which exists in at least three hydrate forms,..(II) the unnamed sodium analogue of hewettite in the trihydrate form,..and (III) the material,..possibly a mixed sodium-calcium variety of the sodium analogue, represented by specimen 4. |